Brush holder



Feb. 10, 1931 W D 1,792,244

BRUSH HOLDER Filed March 3, 1930 ATIORNEYS Patented Feb. 10, 1931 UNITEDSTATES PATENT orrlca CLARENCE RINGWALD; NORTH HAMPTON, OHIO, ASSIGNOR TO ROBBINS t MYERS, INC., 0! SPRINGFIELD, OHIO, A CORPORATION OF OHIO BRUSH HOLDER Applicatloafiled larch 3, 1930. Serial No. 432,745.

This invention relates to improvements in jecting under the brush, the brush is mainbrush holders for electric motors and genertained in proper position. ators. In assembling the mechanism, the coiled One of the objects of the invention is to respring 13 is hooked into suitable openings 14 duce the number of parts as compared with in the arms facing each other after which the prior structures. v slotted portions of the arms are placed in the Another object is to provide for the more grooves of the studs 5, and the brushes are ready assembly and disassembly of the mechplaced against the commutator 6, the clips nism, of the flexible conductors 15 being secured 10 In the accompanying drawings: to the brushes by the screws 10; co Fig. 1 is an end elevation of a brush-hold- One of the advantages of this form of coning mechanism embodying the invention. structlon, aside from the simple and inex- Fig. 2 is a front elevation with portions of pensive design, is that in withdrawing the a motor shown diagrammatically. armature, the brushes and arms are readily 1 Fig. 3 is a fra entary top plan view. removed to provide the necessary clearance 05" Fig. 4 is an en arged horizontal section on for the armature, without the inconvenience th li v H f Fig. 1. of disconnecting any of the parts, support- Fig. 5 is an elevation of a modification. ing members, frame bolts or electrical con- Fig. 6 is a vertical section on the line 66 nectlons. I of Fig. 5. A further advantage is in the use of insu- 70 Referring to the drawings, 1 is a semi-cirlating material for the arms 7, this providing cular pressed-metal support concentrically that a plurality of parts, both of metal and secured to the frame 2 of the motor or generinsulating material, is reduced in number, ator, as the case may be, on the commutator as compared to the construction necessary side, the frame bolts 3 being utilized for the when metallic brush arms are emgloyed. 75* purpose. In the present instance, the member At the upper end of each arm a small 1 is shown as having a forward bend 4 of promoting boss 16 is not ced, th1s be1ng proconsiderable degree. The support 1 is furvided for reater convenience 1n disassembly, ther provided with a pair of shortstuds 5, while at the lower end, a sim lar boss 17 is the forward bend 4 mentioned allowing the Seen, thls latter boss preventing contact of so use of short studs, thus avoiding excess any metallic parts on the arm with the comi ht Th t d hi h are l d t imutator 1n the event the brushes Wear to this distant points from a line through the center extent y I of the motor commutator 6, and are prefer- In Flgs- 9 and 6 1$ Sh0WI1 e mOdlficatwn ably permanently riveted therein, ha,e 1n the manner of forming the arm and securas a groo ing the brush thereto. 2112231132 l 1. 52:25 the upper In this construction, the arm 7 itself is threaded to receive the screw 10 b which the The a 7 which are g fi brush 9 is secured, and to provi e an align- 40 msulatmg mammal thls bemg one 0 8 ing abutment, a boss 18 is extended, and on features and advantages of Present against the under side of. this boss the brush vention. The inwardly opening slot 8 at the is fixed. pp end of each arm P of free move Having thus described my invention, I ment of the arm and easy assembly thereof claim: v 1.

upon the corresponding stud. At the lower 1 I a brush holder, a Support pair end of the arm, the brush 9 is secured, preferf non-conducting arms, mterengaging ably by a screw 10 passed through an aperquickly-detachable means between each arm ture in the brush and threaded into a small and the support, a brush carried by each of metallic angle piece 11, which not only serves said arms, and spring means for holding as a nut, but also, by reason of the leg 12 prosaid arms mterengaged with said support we and said brushes in yielding relation with a commutator.

2. In a brush holder, a support, a pair of non-conducting arms each having one end removably connected with said support, a brush carried by the other endof each of said arms, and means for yieldably holding said arms in connected relation with said support and said brushes in yielding contact with the commutator.

3. In a brush holder, a support, a pair of non-conducting arms, each having one end removably connected with said support, a brush carried by the other end of each arm, and a coil springconnected with said arms. to yieldably hold said arms in con-' nected relation with saidsupport, and said brushes in yielding contact with the commutator.

4, In a non-conducting arms, means for interengag ing one end of each arm with said support consisting of an open slot on one part and a projection to enter said slot on the other part, a brush carried by the other end of each arm, and a coil spring connecting the arms to hold the same in interengaged relation with said support. and to also hold said brushes in yielding contact with the commutator. c

5. In a brush holder, a support, a pair of non-conducting. arms, interengaging quicklydetachable meansbetween each arm and the support, a brush carried by each of said arms, spring means for holding said arms attached tosaid support andsaid brushes in yielding relation with a commutator, and a conductor electrically connected with each brush.

6. In a brush holder, a .metallic support, a pair of arms formed of insulatingmaterial each having. one end removably connected with said support, a brush carried by the other end of each arm, an electrical conductor connected with each brush, and means for yieldably holding said arms in connected relation with said support and said brushes in yielding contact with the commutator.

7; In a brush holder, a metallic support, a pair of non-conduc'iing arms, each arm having an open slot, the open ends of'said slots facing each other, studs on said support to be received in said slots, a coil spring connecting. said arms to yieldably hold the slotted ends of said arms on said studs, a brushcarried by the other end of each arm, said spring also acting to hold said brushes in yielding contact with the commutator.

8. In a brush holder, a support, a pair-of non-conducting arms each having one end re movably conn cted with said support, a brush for each. arm, a screw for connecting said brush with said arm, and an electrical conductor connected with said brush by said screw. 1

brush holder, a support, a pair of 9. In a brush holder, a support, a pair of non-conducting arms each having one end removably connected with said support, a brush for each arm, means for connecting said brush with said arm consisting of a screw and an angle-shaped metallic member, one leg of said niember embracing a side of said arm and having a threaded aperture to receive said screw and the other leg of said angle member embracing the end ot'said.

arm and a portion. at least of the lower side of said brush, and a spring for holding said arms in-yielding engagement with said support and said brushes in yielding contact with a commutator.

10. In a brush holder, a support, a pair of brush holding non-conducting armspivotally connected to saidsupport, a spring connected between said arms to cause thearms to tend to approach each other, the connection between each arm and the support including an open slot on one of the parts whereby the arm may be readily detached from the support, and a brushsuppcrted by each arm and held by said spring in yieldingcontact with the commutator. y

In testimony whereof, I have hereunto set my hand this 25th day of F bruary, 1930.

CLARENCE RINGWALD. 

